Toyota 4Runner: ECM Communication Circuit Malfunction (C1203)
DESCRIPTION
The circuit is used to send control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU via the CAN communication system.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1203 |
The engine/drivetrain specification and/or destination information from the ECM does not match the skid control ECU data. |
ECM |
PROCEDURE
|
1. |
CHECK DTC (ENGINE CONTROL SYSTEM) |
(a) Check if any DTC is recorded for the engine control system (See page
.gif)
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| A | .gif) |
REPLACE ECM |
| B | |
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
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DESCRIPTION
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DESCRIPTION
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When the master cylinder solenoid (skid control ECU) is replaced, the master
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Replacement
REPLACEMENT
CAUTION / NOTICE / HINT
NOTICE:
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DESCRIPTION
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...
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